Methane Distribution and Cycling in Tomales Bay, California
Cycling of methane ( CH4) in Tomales Bay, a 28- km2 temperate estuary in northern California with relatively low inputs of organic carbon, was studied over a 1-yr period. Water column CH4 concentrations showed spatial and temporal variability (range = 8-100 nM), and were supersaturated with respect...
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| Veröffentlicht in: | Estuaries 1998-03, Vol.21 (1), p.66-77 |
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| creator | Sansone, Francis J. Rust, Terri M. Smith, Stephen V. |
| description | Cycling of methane ( CH4) in Tomales Bay, a 28- km2 temperate estuary in northern California with relatively low inputs of organic carbon, was studied over a 1-yr period. Water column CH4 concentrations showed spatial and temporal variability (range = 8-100 nM), and were supersaturated with respect to the atmosphere by a factor of 2-37. Rates of net water column CH4 production-oxidation were determined by in situ experiments, and were not found to be significantly different from zero. Fluxes across the sediment-water interface, determined by direct measurement using benthic chambers, varied from -0.1 μmol m-2 d-1 to +16 μmol m-2 d-1 (positive fluxes into water). Methane concentrations in the two perennial creeks feeding the bay varied annually (140-950 nM); these creeks were a significant CH4 source to the bay during winter. In addition, mass-balance calculations indicate a significant additional winter CH4 source, which is hypothesized to result from storm-related runoff from dairy farms adjacent to the bay. Systemwide CH4 budgets of the 16- km2 inner bay indicate benthic production (110 mol d-1) and atmospheric evasion (110 mol d-1) dominated during summer, while atmospheric evasion (160 mol d-1) and runoff from dairy farms (90 mol d-1) dominated during winter. |
| doi_str_mv | 10.2307/1352547 |
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Water column CH4 concentrations showed spatial and temporal variability (range = 8-100 nM), and were supersaturated with respect to the atmosphere by a factor of 2-37. Rates of net water column CH4 production-oxidation were determined by in situ experiments, and were not found to be significantly different from zero. Fluxes across the sediment-water interface, determined by direct measurement using benthic chambers, varied from -0.1 μmol m-2 d-1 to +16 μmol m-2 d-1 (positive fluxes into water). Methane concentrations in the two perennial creeks feeding the bay varied annually (140-950 nM); these creeks were a significant CH4 source to the bay during winter. In addition, mass-balance calculations indicate a significant additional winter CH4 source, which is hypothesized to result from storm-related runoff from dairy farms adjacent to the bay. Systemwide CH4 budgets of the 16- km2 inner bay indicate benthic production (110 mol d-1) and atmospheric evasion (110 mol d-1) dominated during summer, while atmospheric evasion (160 mol d-1) and runoff from dairy farms (90 mol d-1) dominated during winter.</description><identifier>ISSN: 0160-8347</identifier><identifier>ISSN: 1559-2723</identifier><identifier>EISSN: 1559-2758</identifier><identifier>EISSN: 1559-2731</identifier><identifier>DOI: 10.2307/1352547</identifier><identifier>CODEN: ESTUDO</identifier><language>eng</language><publisher>Lawrence, KS: Estuarine Research Federation</publisher><subject>Biogeochemistry ; Creeks ; Dairy farms ; Earth sciences ; Earth, ocean, space ; Estuaries ; Exact sciences and technology ; Fresh water ; Marine ; Marine and continental quaternary ; Methane ; Organic carbon ; Oxidation ; Runoff ; Sea water ; Sediment-water interface ; Sediments ; Summer ; Surface runoff ; Surface water ; Surficial geology ; Water column ; Winter</subject><ispartof>Estuaries, 1998-03, Vol.21 (1), p.66-77</ispartof><rights>Copyright 1998 Estuarine Research Federation</rights><rights>1998 INIST-CNRS</rights><rights>Estuarine Research Federation 1998</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a511t-5f0dd49a58bd3b3ce77527e5aa14410a5265191f5b49066b02980badc2b80c8b3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/1352547$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/1352547$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2328934$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Sansone, Francis J.</creatorcontrib><creatorcontrib>Rust, Terri M.</creatorcontrib><creatorcontrib>Smith, Stephen V.</creatorcontrib><title>Methane Distribution and Cycling in Tomales Bay, California</title><title>Estuaries</title><description>Cycling of methane ( CH4) in Tomales Bay, a 28- km2 temperate estuary in northern California with relatively low inputs of organic carbon, was studied over a 1-yr period. Water column CH4 concentrations showed spatial and temporal variability (range = 8-100 nM), and were supersaturated with respect to the atmosphere by a factor of 2-37. Rates of net water column CH4 production-oxidation were determined by in situ experiments, and were not found to be significantly different from zero. Fluxes across the sediment-water interface, determined by direct measurement using benthic chambers, varied from -0.1 μmol m-2 d-1 to +16 μmol m-2 d-1 (positive fluxes into water). Methane concentrations in the two perennial creeks feeding the bay varied annually (140-950 nM); these creeks were a significant CH4 source to the bay during winter. In addition, mass-balance calculations indicate a significant additional winter CH4 source, which is hypothesized to result from storm-related runoff from dairy farms adjacent to the bay. 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Systemwide CH4 budgets of the 16- km2 inner bay indicate benthic production (110 mol d-1) and atmospheric evasion (110 mol d-1) dominated during summer, while atmospheric evasion (160 mol d-1) and runoff from dairy farms (90 mol d-1) dominated during winter.</abstract><cop>Lawrence, KS</cop><pub>Estuarine Research Federation</pub><doi>10.2307/1352547</doi><tpages>12</tpages></addata></record> |
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| subjects | Biogeochemistry Creeks Dairy farms Earth sciences Earth, ocean, space Estuaries Exact sciences and technology Fresh water Marine Marine and continental quaternary Methane Organic carbon Oxidation Runoff Sea water Sediment-water interface Sediments Summer Surface runoff Surface water Surficial geology Water column Winter |
| title | Methane Distribution and Cycling in Tomales Bay, California |
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